WM8591 Datasheet, PDF (6/50 Pages) Wolfson Microelectronics plc – 24 BIT, 192 KHZ STEREO CODEC

WM8591
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RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
Digital supply range
DVDD
2.7
Analogue supply range
AVDD, DACREFP
4.5
Ground
AGND, DGND,
DACREFN,
ADCREFGND
Difference DGND to AGND
-0.3
TYP
3.3
5
0
0
MAX
3.6
5.5
UNIT
V
V
V
+0.3
V
Note: Digital supply DVDD must never be more than 0.3V greater than AVDD.
ELECTRICAL CHARACTERISTICS
Test Conditions
AVDD = 5V, DVDD = 3.3V, AGND = 0V, DGND = 0V, TA = +25^oC, fs = 48kHz, MCLK = 256fs unless otherwise stated.
PARAMETER
SYMBOL TEST CONDITIONS
MIN
TYP
MAX
UNIT
Digital Logic Levels (CMOS Levels)
Input LOW level
VIL
0.3 x DVDD
V
Input HIGH level
VIH
0.7 x DVDD
V
Output LOW
VOL
Output HIGH
VOH
Digital Input Leakage Current
IOL=1mA
IOH=1mA
0.1 x DVDD
V
0.9 x DVDD
V
0.9
µA
Digital Input Leakage
Capacitance
TBD
pF
Analogue Reference Levels
Reference voltage
VVMID
Potential divider resistance
RVMID
DAC Performance (Load = 10kΩ, 50pF)
AVDD/2
V
50
kΩ
0dBFs Full scale output voltage
2.0 x
Vrms
AVDD/5
SNR (Note 1,2)
SNR
A-weighted,
105
110
dB
@ fs = 48kHz
SNR (Note 1,2)
SNR
A-weighted
109
dB
@ fs = 96kHz
Dynamic Range (Note 2)
DNR
A-weighted, -60dB
100
110
dB
full scale input
Total Harmonic Distortion
THD
1kHz, 0dBFs
-97
-90
dB
DAC channel separation
130
dB
Channel Level Matching
1kHz signal
0.1
dB
Channel Phase Deviation
1kHz signal
0.04
Degree
Power Supply Rejection Ratio
PSRR
1kHz 100mVpp
50
dB
20Hz to 20kHz
45
dB
100mVpp
ADC Performance
Input Signal Level (0dB)
1.0 x
Vrms
AVDD/5
SNR (Note 1,2)
SNR
A-weighted, 0dB gain
93
102
dB
@ fs = 48kHz
SNR (Note 1,2)
SNR
A-weighted, 0dB gain
99
dB
@ fs = 96kHz
64 x OSR
Dynamic Range (note 2)
DNR
A-weighted, -60dB
102
dB
full scale input
Total Harmonic Distortion
THD
1kHz, 0dBFs
-90
dB
1kHz, -3dBFs
-95
-85
dB
w
PP Rev 1.0 May 2005
6